Termination of patent term

1. Upon expiration, the invention patent right shall be maintained for 20 years from the date of application, and the utility model or design patent right shall be maintained for 10 years from the date of application, and shall be terminated according to law. Where the patent right expires and is terminated according to law, the Patent Office shall notify the patentee and register and announce it in the patent register and patent announcement respectively. After that, the patent application documents will be stored in the invalid file database for management and kept for at least another 3 years. 2. If the Patent Office fails to pay the annual fee and issue a notice of payment to inform the patentee to pay the annual fee and late payment fee for this year, and the patentee fails to pay or fails to pay the annual fee and late payment fee in full after the expiration of the annual fee, the Patent Office shall issue a notice of patent termination within two months, not earlier than one month, and inform the patentee from the date when the late payment fee expires. If the patentee fails to start the recovery procedure or the recovery is not approved, it shall handle the patent registration and patent registration within four months after the termination notice is issued. After that, the patent application file is stored in the invalid file database. The patent termination date shall be the last year's deadline. 3. The patentee voluntarily waives the patent right. The patentee may voluntarily give up his patent right if he voluntarily contributes his invention to the whole society. Where the patentee voluntarily renounces the patent right, it shall make a written statement in the format uniformly formulated by the Patent Office. For example, what kind of assets the patent right belongs to, this is something that the enterprise accountant must understand clearly, because it should be recorded in detail in the account book. The production assets of an enterprise are similar to these machinery and equipment of an enterprise, and intangible assets include the patent right and trademark right of the enterprise, and then the patent right is registered and examined according to law and protected by law.